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LibWeb: Expose StyleValue parsing method in CSS Parser

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Now that StyleResolver is going to deal with StyleComponentValueRules,
it will need to be able to parse those into StyleValues, using
`parse_css_value()`.

Also added StyleValue::is_builtin_or_dynamic(), which returns true for
values that are valid anywhere - things like `initial` and `inherit`,
along with `var()`, `attr()` and `calc()` - which we want to test for
easily.
This commit is contained in:
Sam Atkins 2021-07-18 17:12:23 +01:00 • committed by Andreas Kling
parent 57d34f1966
commit 6e0376361a
3 changed files with 116 additions and 55 deletions
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20
Userland/Libraries/LibWeb/CSS/Parser/Parser.h
View file

@ -19,6 +19,7 @@
#include <LibWeb/CSS/Parser/StyleRule.h>
#include <LibWeb/CSS/Parser/Tokenizer.h>
#include <LibWeb/CSS/Selector.h>
#include <LibWeb/CSS/StyleValue.h>
namespace Web::CSS {
@ -26,7 +27,6 @@ class CSSStyleSheet;
class CSSRule;
class CSSStyleRule;
struct StyleProperty;
class StyleValue;
enum class PropertyID;
class ParsingContext {
@ -127,16 +127,7 @@ public:
NonnullRefPtrVector<Selector> parse_a_relative_selector(TokenStream<T>&);
RefPtr<StyleValue> parse_css_value(PropertyID, TokenStream<StyleComponentValueRule>&);
// FIXME: https://drafts.csswg.org/css-backgrounds-3/
static Optional<String> as_valid_background_repeat(String input) { return input; }
static Optional<String> as_valid_background_attachment(String input) { return input; }
static Optional<String> as_valid_background_position(String input) { return input; }
static Optional<String> as_valid_background_clip(String input) { return input; }
static Optional<String> as_valid_background_origin(String input) { return input; }
static Optional<String> as_valid_background_size(String input) { return input; }
static Optional<String> as_valid_border_style(String input) { return input; }
static Optional<String> as_valid_border_image_repeat(String input) { return input; }
static RefPtr<StyleValue> parse_css_value(ParsingContext const&, PropertyID, StyleComponentValueRule const&);
private:
[[nodiscard]] NonnullRefPtrVector<StyleRule> consume_a_list_of_rules(bool top_level);
@ -177,7 +168,12 @@ private:
static Optional<float> try_parse_float(StringView string);
RefPtr<StyleValue> parse_single_css_value(PropertyID, StyleComponentValueRule const&);
static RefPtr<StyleValue> parse_keyword_or_custom_value(ParsingContext const&, StyleComponentValueRule const&);
static RefPtr<StyleValue> parse_length_value(ParsingContext const&, StyleComponentValueRule const&);
static RefPtr<StyleValue> parse_numeric_value(ParsingContext const&, StyleComponentValueRule const&);
static RefPtr<StyleValue> parse_identifier_value(ParsingContext const&, StyleComponentValueRule const&);
static RefPtr<StyleValue> parse_color_value(ParsingContext const&, StyleComponentValueRule const&);
static RefPtr<StyleValue> parse_string_value(ParsingContext const&, StyleComponentValueRule const&);
ParsingContext m_context;